CN104004902A - Method for extracting carbonaceous matters in gold ores - Google Patents
Method for extracting carbonaceous matters in gold ores Download PDFInfo
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Abstract
Aiming at such disadvantages as long extracting period, severe acid harm, high cost and disturbance of the extraction of carbonaceous matters from precipitates which are formed in the easy reaction between residual carbonate minerals and hydrofluoric acid in a conventional method for extracting the carbonaceous matters in gold ores, the invention provides a method for extracting carbonaceous matters in gold ores; and the method belongs to the field of noble metal metallurgy. The method comprises the steps of: firstly, using hydrochloric acid to remove the carbonate minerals in the gold ores; then, using the hydrochloric acid and the hydrofluoric acid to remove silicate minerals in the gold ores; and finally, using a heavy-liquid flotation method for separation so as to obtain the carbonaceous matters in the gold ores. The method for extracting the carbonaceous matters, provided by the invention, reduces the cost of extracting the carbonaceous matters, shortens the time of extracting the carbonaceous matters, reduces the interference of extracting and separating the carbonaceous matters from the precipitates which are formed in the reaction between the gold ores and the hydrofluoric acid, can obtain the carbonaceous matters with high purity, and establishes the foundation for the in-depth study of the carbonaceous matters in the gold ores.
Description
Technical field
The invention belongs to precious metals metallurgy field, be specifically related to a kind of method of extracting Carbonaceous matter from gold mine.
Background technology
Carbonaceous matter in gold mine can be seized the gold having dissolved by force by suction type in the process of cyanide gold-leaching, forms so-called " robbing gold " phenomenon, thereby causes the rate of recovery of golden Cyanide Leaching low.Except carbonate, the Carbonaceous matter in difficult-treating gold mine mainly comprises elemental carbon, organic acid, hydrocarbons.Elemental carbon may be graphite or decolorizing carbon, and the behavior of its absorption aurous cyanide is similar to gac; Organic carbon over half is humic acids organic acid, and it can form stable golden cyanogen inner complex with gold by self functional group; Hydrocarbons is mainly made up of long chain alkane.Research finds, the Carbonaceous matter that produces " rob gold " effect is mainly gac class material, and humic acid takes second place, and hydrocarbons seems with to rob golden effect irrelevant.In order to make carbonaceous gold ore resource that reserves are huge be able to economy, utilize efficiently, need to further investigate aspects such as composition, character and the impacts on cyanidation gold-extracted process thereof of Carbonaceous matter wherein.But the gangue mineral in gold mine (as quartz, calcite, rhombspar and white mica etc.), metalliferous mineral (pyrite, chalcopyrite and mispickel etc.) have interference effect to the research of Carbonaceous matter, therefore taking effective ways to remove these chaff interferences, is very necessary to obtain highly purified Carbonaceous matter.
At present, in gold mine, the method for Tafuri is still continued to use in the extraction of Carbonaceous matter, and the method mainly comprises demineralization and two steps of density separation.But there is following drawback in the method: (1) is in the demineralization stage, for obtaining at least needing 15 days without the slag of carbonate and silicate, not only extracting cycle is long, and in this process, also to use the hydrochloric acid (HCl) of easy volatile and the hydrofluoric acid (HF) of severe corrosive, use for a long time these acid can cause serious acid evil.(2), in the density separation stage, the heavy-fluid of its use is many sodium wolframates.Many sodium wolframates are to be polymerized by sodium wolframate, and because sodium wolframate chemical property is very active, this reaction process is difficult to control, and therefore the resultant quantity of many sodium wolframates is limited, expensive; And at present domesticly can't synthesize this reagent, mainly rely on import.
Summary of the invention
The harmful carbonate minerals serious, that cost is high, residual of extracting cycle length, acid existing for the conventional extracting method of Carbonaceous matter in gold mine easily reacts the drawbacks such as the extraction of formation precipitation interference Carbonaceous matter with hydrofluoric acid, the invention provides a kind of method of extracting Carbonaceous matter in gold mine, first the method utilizes hot acid liquid to remove the gangue mineral in gold mine, then utilizes Heavy liquid floating method separate sulfur compound and Carbonaceous matter; By above processing, can obtain fast highly purified Carbonaceous matter.
For achieving the above object, technical scheme of the present invention is as follows:
A method of extracting Carbonaceous matter in gold mine, comprises the following steps:
(1) remove carbonate minerals
Adding 2～10mL concentration in every gram of gold mine sample is the ratio of 6～12mol/L hydrochloric acid, and hydrochloric acid and sample ore are mixed, and stirs, and 1000～2000rpm removes acid solution for centrifugal 5～15 minutes;
Repeat above-mentioned steps, until hydrochloric acid does not produce bubble after adding sample ore, 1000～2000rpm removes acid solution in centrifugal 5～15 minutes, obtains removing the sample ore of carbonate minerals;
(2) remove silicate minerals
The sample ore that step (1) is obtained, adding the concentration of 1～4mL in every gram of sample ore is the ratio of mass concentration 40%～70% hydrofluoric acid of 6～12mol/L hydrochloric acid, 2～5mL, first hydrochloric acid and sample ore are mixed, stir 5～10 minutes, add hydrofluoric acid to stir 3～5 hours, 1000～2000rpm removes acid solution for centrifugal 5～15 minutes again;
Repeat after above-mentioned steps 2～4 times, by the centrifugal throw out water obtaining rinse to pH be 7 ± 1, centrifugal 5～15 minutes of 1000～2000rpm, removes supernatant, obtains removing the sample ore of silicate minerals;
(3) Heavy liquid floating
After step (1) and (2) processing, the main component of sample ore is metallic sulfide and Carbonaceous matter, according to the difference of two kinds of mineral densities, utilize Heavy liquid floating method to carry out Heavy liquid floating separation to the two: the heavy-fluid that adds 1～3 times of sample ore volume in the sample ore obtaining to step (2), and heavy-fluid and sample ore are fully mixed, under the condition of rotating speed 2000～3000rpm centrifugal 20～40 minutes, centrifugal after, get the black carbon pledge part on precipitation upper strata, lower floor is metallic sulfide precipitation;
(4) dry
The black carbon pledge of step (3) gained is dried, get final product to obtain Carbonaceous matter extract.
A kind of above-mentioned method of extracting Carbonaceous matter in gold mine, in step (1), in described gold mine sample, the gold mine sample of granularity≤100 μ m accounts for the more than 80% of whole gold mine sample ratios.
A kind of above-mentioned method of extracting Carbonaceous matter in gold mine, in step (1), described agitation condition is, under the condition that is 600～1000rpm, stirs 0.5～1.5 hour at 55～75 DEG C, rotating speed.
A kind of above-mentioned method of extracting Carbonaceous matter in gold mine, in step (2), described agitation condition is, 55～75 DEG C of temperature, rotating speed is 600～1000rpm.
A kind of above-mentioned method of extracting Carbonaceous matter in gold mine, in step (3), described lower metal sulfide precipitation is utilized to Heavy liquid floating method flotation Carbonaceous matter again: to the heavy-fluid that adds 1～3 times of lower sediment volume in lower floor metallic sulfide precipitation, and heavy-fluid and lower sediment are fully mixed, centrifugal 20～40 minutes of rotating speed 2000～3000rpm, after centrifugal, the upper strata black carbon pledge part of taking precipitate; By after step (3) and the merging of this Heavy liquid floating gained Carbonaceous matter, utilize Heavy liquid floating method to carry out flotation again: in the Carbonaceous matter merging, to add the heavy-fluid of 1～3 times of Carbonaceous matter volume, and heavy-fluid and Carbonaceous matter are fully mixed, centrifugal 20～40 minutes of rotating speed 2000～3000rpm, after centrifugal, the upper strata black carbon pledge part of taking precipitate.
A kind of above-mentioned method of extracting Carbonaceous matter in gold mine, described heavy-fluid density is 2.1～2.5g/mL.
A kind of above-mentioned method of extracting Carbonaceous matter in gold mine, described heavy-fluid is the mixed solution of solder(ing)acid, the zinc bromide aqueous solution or tetracol phenixin and water.
A kind of above-mentioned method of extracting Carbonaceous matter in gold mine, the well-mixed mode of described heavy-fluid and sample ore or heavy-fluid and precipitation or heavy-fluid and Carbonaceous matter is processed 20～40 minutes for the two is put into power 250W ultrasonic cleaner.
A kind of above-mentioned method of extracting Carbonaceous matter in gold mine, in step (4), described furnace drying method is at vacuum tightness 20KPa, dries or put 70～80 DEG C of oven dry in baking oven in the vacuum drying oven of 50～70 DEG C.
The present invention compared with prior art, has the following advantages:
1, method provided by the invention has improved the purity of the Carbonaceous matter that extracts.The method of Carbonaceous matter in existing extraction gold mine, is removing easy residual carbonate minerals of carbonate minerals stage, and these residual carbonate mineralss easily reacts with hydrofluoric acid to form and precipitate, the extraction of interference Carbonaceous matter with separate.In order to remove the interference of residual carbonate minerals, the present invention is in the step of removal silicate, under heating condition, use hydrochloric acid and hydrofluoric acid co-treatment sample ore, the method can further be removed residual carbonate minerals in sample ore in the time processing sample ore mesosilicic acid salt, has alleviated it and react the throw out forming to Carbonaceous matter extraction and the interference separating with hydrofluoric acid.
2, method provided by the invention has reduced the cost that extracts carbon species.The heavy-fluids such as the mixed solution of solder(ing)acid, the zinc bromide aqueous solution and tetracol phenixin and water that the present invention is 2.1～2.5g/mL by density replace many sodium wolframates heavy-fluid, Heavy liquid floating cost is only original in 1 ‰ of many sodium wolframates, greatly reduces the cost that extracts carbon species in gold mine.
3, method provided by the invention has shortened the time of extracting carbon species.The present invention has used centrifugal method and has not used conventional filter type in solid-liquid separation process, and all under heating condition, carry out in the time removing carbonate minerals and silicate minerals, its object is and shortens the time of extracting Carbonaceous matter, accelerates speed of reaction, alleviates acid evil.
4, the Carbonaceous matter in gold mine is after the inventive method is extracted, by analysis, wherein, carbon element content is 64.36～84.12%, and silicon content is 1.53～3.39%, and iron content is 1.17～4.93%, element sulphur content is 0.95～2.38%, arsenic element content is 0.14～0.89%, and aluminium element content is 0.18～0.52%, and calcium element content is 0.04～0.72%; And carbon content is 2.82～3.76% in former gold mine, silicone content is 16.98～27.11%, iron level is 15.80～33.62%, sulphur content is 9.35～14.72%, arsenic content is 3.51～8.16%, and aluminium element content is 3.79～6.43%, and calcium element content is 5.82～7.44%, ultimate analysis data presentation, the method can effectively extract highly purified Carbonaceous matter from gold mine.
Brief description of the drawings
Fig. 1 is the process flow sheet that the present invention extracts Carbonaceous matter in gold mine.
Embodiment
The thermostatic mixer model adopting in the embodiment of the present invention is the JB300-D of Shanghai Sample Model Factory type.
The density adopting in the embodiment of the present invention is counted Dahometer DE-120T type.
The whizzer model adopting in the embodiment of the present invention is Hunan instrument table-type low-speed whizzer L550 type.
The vacuum drying oven adopting in the embodiment of the present invention is the Shanghai leap DZF-1B of medical apparatus and instruments factory type.
The inductive coupling plasma emission spectrograph adopting in the embodiment of the present invention is the Optima 8300DV type of PE company of the U.S..
The hydrochloric acid, hydrofluoric acid, zinc chloride, zinc bromide, tetracol phenixin and the many sodium wolframates that in the embodiment of the present invention, adopt are commercially available prod, are mixed with required solution with distilled water.
Embodiment 1
This routine handled gold mine is from GOLD DEPOSIT IN SICHUAN, and the content of its principal element is in table 1, and the sreen analysis after its ore grinding shows, the gold mine sample of granularity≤100 μ m accounts for 80% of total amount; In this gold mine, main gold bearing sulfide is pyrite, magnetite and mispickel, and main gangue mineral is quartz, magnesian calcite, rhombspar and white mica.
The content of principal element in table 1 example 1 gold mine
A method of extracting Carbonaceous matter in gold mine, comprises the following steps:
(1) remove carbonate minerals
Adding 2mL concentration in every gram of gold mine sample is the ratio of 12mol/L hydrochloric acid, and hydrochloric acid and sample ore are mixed, and under the condition that is 600rpm, stirs 0.5 hour at 55 DEG C, rotating speed, and 1000rpm removes acid solution for centrifugal 15 minutes;
Repeat above-mentioned steps 2 times, then after adding hydrochloric acid, sample ore no longer produces bubble, 1000rpm removes acid solution in centrifugal 15 minutes, obtains removing the sample ore of carbonate minerals;
(2) remove silicate minerals
The sample ore that step (1) is obtained, adding 1mL concentration in every gram of sample ore is that 12mol/L hydrochloric acid, 2mL mass concentration are the ratio of 70% hydrofluoric acid, first hydrochloric acid is mixed with sample ore, under the condition that is 600rpm at 55 DEG C, rotating speed, stir 10 minutes, again hydrofluoric acid is added, stir under the same conditions 3 hours, 2000rpm removes acid solution for centrifugal 5 minutes;
After repetition above-mentioned steps 4 times, it is that 6,1000rpm removes supernatant in centrifugal 15 minutes that the centrifugal throw out water obtaining is rinsed to pH, obtains removing the sample ore of silicate minerals;
(3) Heavy liquid floating
After step (1) and (2) processing, the main component of sample ore is metallic sulfide and Carbonaceous matter, according to the difference of two kinds of mineral densities, utilize Heavy liquid floating method to carry out flotation separation to it: the zinc chloride heavy-fluid that the density that adds 1 times of sample ore volume in the sample ore obtaining to step (2) is 2.5g/mL, stirs heavy-fluid and sample ore is fully mixed; Then under the condition of rotating speed 2000rpm centrifugal 40 minutes; After centrifugal, precipitation is obviously divided into two-layer, gets upper strata black carbon pledge part;
(4) dry
By the black carbon pledge of above-mentioned gained put in baking oven 70～80 DEG C dry, obtain extracted Carbonaceous matter product.
Utilize inductive coupling plasma emission spectrograph (ICP) to measure the content of principal element in Carbonaceous matter: wherein the content of carbon is 64.36%, the content of element silicon is 3.39%, the content of ferro element is 1.17%, the content of element sulphur is 0.95%, the content of arsenic element is 0.49%, the content of aluminium element is 0.52%, and the content of calcium constituent is 0.72%.The Carbonaceous matter of this purity can be used for the research of the aspects such as X-ray diffraction analysis (XRD), Infrared spectroscopy (IR) and gas chromatography-mass spectrography analysis (GC-MS).
The content of principal element in table 2 example 1 carbonaceous extract
Embodiment 2
This routine handled gold mine is from Shaanxi gold mine, and the content of its principal element is in table 3, and the sreen analysis after its ore grinding shows, granularity≤100 μ m accounts for 88%; In this gold mine, main gold bearing sulfide is pyrite and mispickel, and main gangue mineral is quartz, calcite, rhombspar and white mica.
The content of principal element in table 3 example 2 gold mines
A method of extracting Carbonaceous matter in gold mine, comprises the following steps:
(1) remove carbonate minerals
Adding 6mL concentration in every gram of sample ore is the ratio of 9mol/L hydrochloric acid, and hydrochloric acid is joined in sample ore; Under the condition that is 800rpm at 65 DEG C, rotating speed, stir 1 hour, 2000rpm removes acid solution for centrifugal 5 minutes;
Repeat above-mentioned steps 3 times, then after adding hydrochloric acid, sample ore no longer produces bubble, 2000rpm removes acid solution in centrifugal 5 minutes, obtains removing the sample ore of carbonate minerals;
(2) remove silicate minerals
The sample ore that step (1) is obtained, adding 2mL concentration in every gram of sample ore is that hydrochloric acid, the 3mL mass concentration of 9mol/L is the ratio of 55% hydrofluoric acid, first hydrochloric acid is mixed with sample ore, under the condition that is 800rpm at 65 DEG C, rotating speed, stir 8 minutes, again hydrofluoric acid is added, stir under the same conditions 4 hours, 1000rpm removes acid solution for centrifugal 15 minutes;
Repeat above-mentioned steps 3 times, it is that 7,2000rpm removes supernatant in centrifugal 5 minutes that the centrifugal throw out water obtaining is rinsed to pH, obtains removing the sample ore of silicate minerals;
(3) Heavy liquid floating
After step (1) and (2) processing, the main component of sample ore is metallic sulfide and Carbonaceous matter, according to the difference of two kinds of mineral densities, utilize Heavy liquid floating method to carry out flotation separation to it: the zinc bromide heavy-fluid that the density that adds 2 times of sample ore volumes in the sample ore obtaining to step (2) is 2.3g/mL, in the ultrasonic cleaner that is 250W at power, process 20～30 minutes, heavy-fluid and sample ore are fully mixed; Then under the condition of rotating speed 2500rpm centrifugal 30 minutes, centrifugal after, precipitation is obviously divided into two-layer, gets precipitation upper strata black carbon pledge part;
Metallic sulfide part to precipitation lower floor is carried out Heavy liquid floating again: add to lower sediment the zinc bromide heavy-fluid that the density of 1 times of lower sediment volume is 2.3g/mL, in the ultrasonic cleaner that is 250W at power, process 20～30 minutes, heavy-fluid and precipitation are fully mixed; Then under the condition of rotating speed 3000rpm centrifugal 20 minutes, centrifugal after, get precipitation upper strata black carbon pledge part;
Will twice flotation gained Carbonaceous matter carry out Heavy liquid floating for the third time after merging: the zinc bromide heavy-fluid that is 2.3g/mL to the density that adds 3 times of Carbonaceous matter volumes in the Carbonaceous matter merging, in the ultrasonic cleaner that is 250W at power, process 20～30 minutes, heavy-fluid and Carbonaceous matter are fully mixed, under the condition of rotating speed 2000rpm centrifugal 40 minutes, get the black carbon pledge part on precipitation upper strata;
(4) dry
The black carbon pledge of above-mentioned gained is deposited in to 20KPa, in the vacuum drying oven of 50～60 DEG C, dries, obtain extracted Carbonaceous matter product.
Utilize inductive coupling plasma emission spectrograph (ICP) to measure the content of principal element in Carbonaceous matter: wherein the content of carbon is 72.9%, the content of element silicon is 1.53%, the content of ferro element is 4.93%, the content of element sulphur is 1.76%, the content of arsenic element is 0.14%, the content of aluminium element is 0.37%, and the content of calcium constituent is 0.24%.The Carbonaceous matter of this purity can be used for the research of the aspects such as X-ray diffraction analysis (XRD), Infrared spectroscopy (IR) and gas chromatography-mass spectrography analysis (GC-MS).
The content of principal element in table 4 example 2 carbonaceous extracts
The conventional extracting method of Carbonaceous matter in comparative example 1 gold mine
This routine handled gold mine is with embodiment 2.
A method of extracting Carbonaceous matter in gold mine, comprises the following steps:
(1) remove carbonate minerals
Adding 6mL concentration in every gram of sample ore is the ratio of 9mol/L hydrochloric acid, and hydrochloric acid is joined in sample ore; Under the condition that is 800rpm at rotating speed, stir 5 hours, 2000rpm removes acid solution for centrifugal 5 minutes;
Repeat above-mentioned steps 3 times, then after adding hydrochloric acid, sample ore no longer produces bubble, 2000rpm removes acid solution in centrifugal 5 minutes, obtains removing the sample ore of carbonate minerals;
(2) remove silicate minerals
The sample ore that step (1) is obtained, adding 3mL mass concentration in every gram of sample ore is that the ratio of 55% hydrofluoric acid is mixed hydrofluoric acid and sample ore, stirs 10 hours at rotating speed under the condition that is 800rpm, the centrifugal 15min of 1000rpm removes acid solution;
Repeating step (2) 3 times, is that 7,2000rpm centrifugal 5 minute remove supernatant with distilled water flushing to pH by throw out, obtains removing the sample ore of silicate minerals;
(3) Heavy liquid floating
Method is with the step (3) of embodiment 2, and heavy-fluid replaces with many sodium tungstate solutions that density is 2.3g/mL;
(4) dry
Method is with the step (4) of embodiment 2.
Utilize inductive coupling plasma emission spectrograph (ICP) to measure the content of principal element in Carbonaceous matter: wherein the content of carbon is 33.59%, the content of element silicon is 12.26%, the content of ferro element is 8.55%, the content of element sulphur is 8.32%, the content of arsenic element is 1.08%, the content of aluminium element is 1.05%, and the content of calcium constituent is 4.22%.From above chemical analysis data, the carbon content of the method gained carbonaceous extract is lower, and foreign matter content is higher, can have stronger interference effect to follow-up research.
The content of principal element in table 5 comparative example 1 carbonaceous extract
Embodiment 3
This routine handled carbonaceous gold ore is from gold mine in Guangxi, and the content of its principal element is in table 6, and the sreen analysis after its ore grinding shows, granularity≤100 μ m accounts for 85%, in this gold mine main gold bearing sulfide be pyrite,
Pyrrhotite and mispickel, main gangue mineral is quartz, rhombspar and white mica.
The content of principal element in table 6 example 3 gold mines
A method of extracting Carbonaceous matter in gold mine, comprises the following steps:
(1) remove carbonate minerals
Adding 10mL concentration in every gram of sample ore is the ratio of 6mol/L hydrochloric acid, and hydrochloric acid and sample ore are mixed; Under the condition that is 1000rpm at 75 DEG C, rotating speed, stir after 1.5 hours, 1500rpm removes acid solution for centrifugal 10 minutes;
Repeat above-mentioned steps 4 times, then after adding hydrochloric acid, sample ore no longer produces bubble, 1500rpm removes acid solution in centrifugal 10 minutes, obtains removing the sample ore of carbonate minerals;
(2) remove silicate minerals
The sample ore that step (1) is obtained, adding 4mL concentration in every gram of sample ore is that hydrochloric acid, the 5mL mass concentration of 6mol/L is the ratio of 40% hydrofluoric acid, first hydrochloric acid is mixed with sample ore, under the condition that is 1000rpm at 75 DEG C, rotating speed, stir 5 minutes, again hydrofluoric acid is added, stir under the same conditions 5 hours, 1500rpm removes acid solution for centrifugal 10 minutes;
Repeat above-mentioned steps 2 times, it is that 8,1500rpm removes supernatant in centrifugal 10 minutes that the throw out water obtaining is rinsed to pH, obtains removing the sample ore of silicate minerals;
(3) Heavy liquid floating
After step (1) and (2) processing, the main component of sample ore is metallic sulfide and Carbonaceous matter, according to the difference of two kinds of mineral densities, utilize Heavy liquid floating method to carry out flotation separation to it: the tetracol phenixin heavy-fluid that the density that adds 3 times of sample ore volumes in the sample ore obtaining to step (2) is 2.1g/mL, in the ultrasonic cleaner that is 250W at power, process 30～40 minutes, heavy-fluid and sample ore are fully mixed; Then under the condition of rotating speed 3000rpm centrifugal 20 minutes, centrifugal after, precipitation is obviously divided into two-layer, gets upper strata black carbon pledge part;
Metallic sulfide part to precipitation lower floor is carried out Heavy liquid floating again: after lower sediment adds the density of 3 times of lower sediment volumes to be 2.1g/mL tetracol phenixin heavy-fluid, in the ultrasonic cleaner that is 250W at power, process 30～40 minutes, heavy-fluid and sample ore are fully mixed; Then under the condition of rotating speed 2000rpm centrifugal 40 minutes, centrifugal after, get precipitation upper strata black carbon pledge part;
Will twice flotation gained Carbonaceous matter carry out Heavy liquid floating for the third time after merging: to the 2.1g/mL tetracol phenixin heavy-fluid that adds 1 times of carbon species volume in the Carbonaceous matter merging, in the ultrasonic cleaner that is 250W at power, process 30～40 minutes, centrifugal 20min under the condition of rotating speed 3000rpm, gets the black carbon pledge part that precipitates upper strata;
(4) dry
The black carbon pledge of previous step gained is deposited in to 20KPa, in the vacuum drying oven of 60～70 DEG C, dries, obtain extracted Carbonaceous matter product.
Utilize inductive coupling plasma emission spectrograph (ICP) to measure the content of the principal element in Carbonaceous matter that extracts: wherein the content of carbon is 84.12%, the content of element silicon is 3.26%, the content of ferro element is 4.51%, the content of element sulphur is 2.38%, the content of arsenic element is 0.89%, the content of aluminium element is 0.18%, and the content of calcium constituent is 0.04%.The Carbonaceous matter of this purity can be used for the research of the aspects such as X-ray diffraction analysis (XRD), Infrared spectroscopy (IR) and gas chromatography-mass spectrography analysis (GC-MS).
The content of principal element in table 7 example 3 carbonaceous extracts
Claims (9)
1. a method of extracting Carbonaceous matter in gold mine, is characterized in that, comprises the following steps:
(1) remove carbonate minerals
Adding 2～10mL concentration in every gram of gold mine sample is the ratio of 6～12mol/L hydrochloric acid, and hydrochloric acid and sample ore are mixed, and stirs, and 1000～2000rpm removes acid solution for centrifugal 5～15 minutes;
Repeat above-mentioned steps, until hydrochloric acid does not produce bubble after adding sample ore, 1000～2000rpm removes acid solution in centrifugal 5～15 minutes, obtains removing the sample ore of carbonate minerals;
(2) remove silicate minerals
The sample ore that step (1) is obtained, adding the concentration of 1～4mL in every gram of sample ore is that the mass concentration of 6～12mol/L hydrochloric acid, 2～5mL is the ratio of 40%～70% hydrofluoric acid, first hydrochloric acid and sample ore are mixed, stir 5～10 minutes, add hydrofluoric acid to stir 3～5 hours, 1000～2000rpm removes acid solution for centrifugal 5～15 minutes again;
Repeat after above-mentioned steps 2～4 times, by the centrifugal throw out water obtaining rinse to pH be 7 ± 1, centrifugal 5～15 minutes of 1000～2000rpm, removes supernatant, obtains removing the sample ore of silicate minerals;
(3) Heavy liquid floating
In the sample ore obtaining to step (2), add the heavy-fluid of 1～3 times of sample ore volume, and heavy-fluid and sample ore are fully mixed, under the condition of rotating speed 2000～3000rpm centrifugal 20～40 minutes, centrifugal after, get the black carbon pledge part on precipitation upper strata, lower floor is metallic sulfide precipitation;
(4) dry
The black carbon pledge of step (3) gained is dried, get final product to obtain Carbonaceous matter extract.
2. a kind of method of extracting Carbonaceous matter in gold mine according to claim 1, is characterized in that, in step (1), in described gold mine sample, the gold mine sample of granularity≤100 μ m accounts for the more than 80% of whole gold mine sample ratios.
3. a kind of method of extracting Carbonaceous matter in gold mine according to claim 1, is characterized in that, in step (1), described agitation condition is, under the condition that is 600～1000rpm, stirs 0.5～1.5 hour at 55～75 DEG C, rotating speed.
4. a kind of method of extracting Carbonaceous matter in gold mine according to claim 1, is characterized in that, in step (2), described agitation condition is that 55～75 DEG C of temperature, rotating speed are 600～1000rpm.
5. a kind of method of extracting Carbonaceous matter in gold mine according to claim 1, it is characterized in that, to the heavy-fluid that adds 1～3 times of lower sediment volume in the lower metal sulfide precipitation described in step (3), and heavy-fluid and lower sediment are fully mixed, centrifugal 20～40 minutes of rotating speed 2000～3000rpm, after centrifugal, the upper strata black carbon pledge part of taking precipitate; By after step (3) and the merging of this Heavy liquid floating gained Carbonaceous matter, in the Carbonaceous matter merging, add the heavy-fluid of 1～3 times of Carbonaceous matter volume, and heavy-fluid and Carbonaceous matter are fully mixed to centrifugal 20～40 minutes of rotating speed 2000～3000rpm, after centrifugal, the upper strata black carbon pledge part of taking precipitate.
6. a kind of method of extracting Carbonaceous matter in gold mine according to claim 1 or 5, is characterized in that, described heavy-fluid density is 2.1～2.5g/mL.
7. a kind of method of extracting Carbonaceous matter in gold mine according to claim 1 or 5, is characterized in that, described heavy-fluid is the mixed solution of solder(ing)acid, the zinc bromide aqueous solution or tetracol phenixin and water.
8. a kind of method of extracting Carbonaceous matter in gold mine according to claim 1 or 5, it is characterized in that, the well-mixed mode of described heavy-fluid and sample ore or heavy-fluid and precipitation or heavy-fluid and Carbonaceous matter is that 250W ultrasonic cleaner is processed 20～40 minutes for the two is put into power.
9. a kind of method of extracting Carbonaceous matter in gold mine according to claim 1, is characterized in that, in step (4), described furnace drying method is at vacuum tightness 20KPa, dries or put 70～80 DEG C of oven dry in baking oven in the vacuum drying oven of 50～70 DEG C.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106596605A (en) * | 2016-11-29 | 2017-04-26 | 中国石油天然气股份有限公司 | Method for preparing high purity kerogen |
| CN111822154A (en) * | 2020-07-30 | 2020-10-27 | 济南大学 | Method for floating silicon from silicon slag |
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| CN106596605B (en) * | 2016-11-29 | 2019-11-08 | 中国石油天然气股份有限公司 | It is a kind of to prepare high-purity kerogenic method |
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